This high-efficiency replacement HEPA filter features a pharmaceutical-grade gel seal engineered to capture ultra-fine airborne pathogens, bioaerosols, and microscopic contaminants in critical healthcare environments. Designed with microglass mini-pleat media housed in a durable frame, it delivers 99.99% filtration efficiency down to 0.3 microns. It is specifically built for compatibility with legacy Abatement Technologies HC800C and HC800F air filtration units (serial numbers 400+ manufactured prior to January 1, 2004) to maintain an airtight seal without air bypass.